Improvement in fubnaces



WILLIAM ENNIs, OF HUDSON, kNew JERSEY. Letters Patent No. 60,867, dated January l, 1867.' I

IMPROVEMENT IN FURNAGES.

dlgs Scintille referat tu in that netten iertnit ma mating ,tnt nf tige :timeI TO ALL WHOM IT MAY QONCERN:

Be it known that I, WILLIAM ENnIs, of Hudson, in the county of Hudson, and State of-New Jersey, have invented a certainrnew and useful Improvement in Furnaces, of which the following is a full, clear, and exact description, reference being had to the accompanying drawing, forming part of this specific-ation, and in which- Figure 1 represents a longitudinal Sectional elevation of a furnaceconstructed `according to my improvement and i i Figure 2, a transverse section thereof, taken as indicated by the line :c :vin lig. l1.

Like letters indicate like parts in both figures.

My improvement has reference more particularly t0 that description of furnace described in Letters Patent of the United States issued to Joseph Hindlc, assignee of Ferdinand Braun, bearing date May 17, 1364, in which al basket' grate is used, composed of two inclined sections and a horizontal section with side channels foi-'supplying-the inclined sides of the grate with fuel, such as coal dust, saw dust, orA other'simili'ir 0 1' refuse materials. The purpose to which the furnace is to be applied is immaterial, it being equally suited to domestic as to manufacturing uses, whether for heating steam boilers or otherwise.

The economy resulting from the use of fuel of th character'here mentioned is well understood, but there are diilicultiesiwhich occasionallyV arise that require to be met to make the employment of such fuel advantageously available. Thus, in burning very iine fuel of this description, say, the finerefuse of 'sifted coal dust, as it is termed, there is then an uniitncss in the present construction of grates, that is, in the basket form, made with round holes or perforations in its inclined sides; as these openings, if large, allow-the coal dust to fall through and be wasted, while, if veryl small, they choke 'and interfere with the combustion. To obviate this defect is the object of my improvement, which has for its end the obtainment of a large grate a1'ea.or `air space between. the bars of'the inclined sides of the grate with but little or no tendency, however, for the coal or other dust, however ne, to fall or pass through, nor yet of it tovehoke the grate. I use for this purpose, in connec- .tion with side supply passages or openings feeding .the fuel from above, a basket grate, in which the bars of the inclined sides are made up of slats arranged after the manner of steps, somewhat similar to the mere disposition of the slats in the grates of a totally different character, and preferably make said slats to prevent a downward inclination of theiri'aces in an inward direction, which serves to prevent the dust from lodging on the slats, and, in connection with air chambers outside of said inclined sides, creating a draught through between the bars, eiectually tends to prevent choking. I

Having thus described in full the `nature of my invention, the following description of itwith reference to the accompanying drawing will suffice to further and fully explain the same.

' A A are the furnace walls, which are or may be extended to form a drying-chamber, B, for the fuel arranged over the arch C ofthe grate, and Awhich from its shape will 'serve to distribute the powdery fuel'equally, or thereabouts, to both sides of the grate by apertures a a, which may be openedand closed, andi have their discharge regulated by means of slides or other devices. The arch, C, may alsoserve as a retlector, to aid the coinbustion of the fuel. D is the basket grate; E, its flue opening; and F, a fire door opening for inserting any suitable combustible material on starting the i'ire or ignition of the coal dust fed byfth'e-` apertures a, .after which said opening may be closed. The inclined sides of this grate are made 'up of closely arranged slats, b b, one above the other, -in step fashion, and preferably inclining downward in an inwardly direction, so that while the' in passing on to the grate by the apertures t hasv its fall broken by the step lconstruction ofthe grate, which largely contributes to its combustion, the inclined position of the slats, aided, too, by.air rushing from back or side air chambers,vG, provided with inlets, c, serves eifectually to prevent chokn'g'oi` the grate, the

' side b ars or slats of which give a wide distribution and large area of air space between them to eli'ect combustion of the fuel, while there is but little or'no tendency to choke or of the fuel falling through the interstices of the slats o r bars which constitute the sides of the grate. Thus, the slatted sides of the grate, supplied as described, possess advantages which do not ordinarily attach to other slatted grates for burning fuel of a diiferent character. The vloweror horizontal portion, d, of the grate, which communicates with the ashpit, S, below, may be of ordinary construction. l i

What I claim herein as new and useful, and desire to securevby Letters Patent, is-

The combination 'of the basket grate with its 'sides made of overlapping slats, as described, air chambersGr, and supply apertures a a, constructed and arranged substantially as and for the purpose'or purposes herein specified.

WILLl-AM ENNIS.Y

Witnesses:

P A. Ln Online, i

J. W. connes. 

